Thermoelectric transport properties of CuFeInTe3

JOURNAL OF ALLOYS AND COMPOUNDS

卷:651

Article

Cabrera, H.^1,2  Zumeta-Dube, I.³  Korte, D.⁴  Grima-Gallardo, P.⁵  Alvarado, F.⁵  Aitken, J. A.⁶  Brant, J. A.⁶  Zhang, J. H.⁶  Calderon, A.³  Marin, E.³  Aguilar-Frutis, M.³  Erazo, J. E.⁵  Perez-Cappe, E.⁷  Franko, M.⁴ 

[1] Abdus Salaam Int Ctr Theoret Phys, SPIE ICTP Anchor Res Lab, Trieste, Italy

[2] IVIC, Ctr Multidisciplinario Ciencias, Merida, Venezuela

[3] Inst Politecn Nacl, Ctr Invest Ciencia Aplicada & Tecnol Avanzada, Unidad Legaria, Mexico City 11500, DF, Mexico

[4] Univ Nova Gorica, Environm Res Lab, Nova Gorica 5000, Slovenia

[5] Univ Los Andes, Dept Fis, Fac Ciencias, CES, Merida, Venezuela

[6] Duquesne Univ, Dept Chem & Biochem, Pittsburgh, PA 15219 USA

[7] Univ La Habana, Inst Ciencia & Tecnol Mat IMRE, Vedado, Cuba

关键词: Thermoelectric materials;    Seebeck coefficient;    Figure of merit;   

DOI  :  10.1016/j.jallcom.2015.08.128

来源: Elsevier

【 摘 要 】

In this paper we report on the preparation of CuFeInTe3 and its thermoelectric properties. Optical diffuse reflectance and Raman scattering spectroscopies, as well as X-ray powder diffraction were also carried out. Unprecedented for CuFeInTe3, a direct and an indirect band gap were found from its absorption spectrum. From Hall effect measurements at 300 K the carrier concentration (n), electrical conductivity (sigma) and mobility (mu) were determined. In order to investigate whether this material is suitable for thermoelectric applications, the Seebeck coefficient (S), the thermal conductivity (kappa) and sigma as a function of temperature were measured. The measurements of Hall and Seebeck coefficients showed that alloying CuInTe2 with Fe2+ produces a change from the original p-type to n-type conductivity and causes a decrease in the k value, while leaving s unchanged. Relatively large S values were found for CuFeInTe3, with respect to CuInTe2, which were explained on the basis of a probable electron effective mass increase due to Fe2+ incorporation. It was also found, that thermal and electrical conductivities decrease with increasing temperature in the range between 300 and 450 K, while the figure of merit (zT) reaches values of 0.075 and 0.126 at 300 and 450 K respectively. Thus, the zT of CuFeInTe3 increases with temperature, reaching values larger than those reported for CuInTe2. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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